It would make ice farming somewhat easier, perhaps. It may not end up replacing Silk Touch ice farming entirely, as it still cannot function in the Nether. It can also be used if you want to create a structure in the middle of the ocean in the middle of your travels. I myself have a tendency to carry lilypads with me when I go boating. That was during a bug that made it impossible to fish in a boat. As the ice is temporary, it can be used as a scaffold. I am a bit sad to hear it can't ease ice farming with the snapshot. If you are near an Ocean Monument, you could use it to obscure the guardians view of you.

This Is Cool,I Like Too,But In The Image The Ice Broken Super Fast,I Think...